Bit sharpening machine



Oct. 26 1926. 1,604,865

C. M. WEIMER BIT SHARPENlNG MACHINE Filed March 24, 1924 i ii Patented@et. 26, 1926.

CHARLES MI. WEIMEB, OF BBOWNFIELD, PENNSYLVANIA.

BIT SHARPENING MACHINE.

Application filed March Z, 1924. Serial No. 701,345.

This invention relates to bit sharpening machines.

In the operation ofcutter bit sharpeners the cutting portion of the bitduringthe forming or sharpening operation is materially cooled while theshank portion thereof remains at a substantially highworkingtemperature, this being due to the fact that the cutting portion isusually tapered and much thinner and also comes into contact withsubstantially cold dies. Accordingly, when the bits are plunged directlyinto a tempering bath upon discharge'from the machine the bit portionwill not be properly tempered due to being relatively cold. In order toobtain a proper temper it has heretofore been necessary to reheat thebits before being plunged into the tempering bath. It has been foundthat theheat retained in the shank of the bit is sufiicient to raise thetemperature of the'cooled bit portion if sufficient time is allowed forthe redistribution of the heat. It is an object of my invention toprovide a bit sharpener having improved means for insuring a moreuniform distribu-- tion of heat in the bit before it is tempered. Afurther object is to provide improved means for temporarily holding abit after it is formed or sharpened until the cutting portion thereofhas absorbed enough heat from the body portion of the bit so that thebit can be dropped directly into a tempering bath. A still furtherobject is to provide improved bit control means which will cooperatewith some usual operating lever or means that controls the operation ofsome other member of the machine, thereby enabling these results to beobtained without extra effort on the part of the operator.

In the accompanying drawings I have shown for purposes of illustrationone form which my invention may assume in prac' tice.

In these drawings Fig. 1 is a side elevation ofmyimproved sharpeningdevice.

Fig. 2 is a front elevation, are broken away struction.

Fig. 3 is-a vertical longitudinal section taken substantially on line 33of Fig. 2.

1n the illustrative form of my invention I have shown the same embodiedin .a bit sharpener comprising a mainframe 1 supparts of which to show.details of conported at its front and rear ends by legs 2 and. 3, whilecarried therebyis acombined pulley and flywheel 4 adapted to reciprocatethe movable element of the bit forming means 5 as by any suitable meanssuch as a crank and connecting rod pivoted at 6 to the member 5. a Morespecifically, the arrangement of the bit forming means comprises a bodyportion 7 slidably mountedv i tittt tififin ttihtl'ifil) STATES PATENTwithin suitable guideways formed in the 7 sides of the main frame 1 andhaving a memberS pivoted thereon as at 9. Pivotally mounted upon themember 8 is a clapper box 10 carrying a die roller 11 at its lower endthus allowing the roller to swing outwardly on reverse movement of thememher 5 while adapted to be held in fixed position on forward movementthereof as by.

abutting the member 8 at 12. In order to allow the member 8 to yieldagainst excessive forces to prevent injury thereof,1 have provided ayieldable spring 13 seated within a recess 14} formed in the member? andabuttlng at its upper end a. screw 15. A.

bolt 16 may be used for adjustably limiting the downward movement of the.roller 11 caused by the spring 13.

Cooperating with the groovedroller 11 are stationary dies generallyindicated at 17 and adapted to support a bit blank 18 which restsagainst an inclined surface 19 formed on a longintudinally adjustablemember 20 actuated by any suitable means such as a rack and gear segment21. Upon operation of the latter. bit 18 will be forced upwardly tofurther engage the roller 11. When the bit is completely formed,suitable means are provided for discharging the same which comprises atransversely movable member 22 having a longitudinal'locking groove 23 fadapted to cooperate with the forward portion of the member 20 whichcarries the inclined surface. Thus, by moving the mem ber 20 rearwardly,the discharging die portion 22 may be moved laterally by any suitablemeans such as a rod 24; pivoted to a control lever 25 mounted upon theside of the machine. Upon discharge of the bit, the same will drop intoa chute 26 which is closed at its outer end by a gate 27 pivoted. at itsupperend as at 28 while the lower end thereof is held in abuttingengagement with the chute 26 by a spring 29. Any suitable means can beused for opening the gate 2?, herein shown as comprising a lever 30 towhichis attached a suitable flexible member 31 riding over a guidepulley32 and fixed to afoot treadle 33. This foot treadle controls Hillperature for, discharging into a suitable temperingbath disposedimmedlately below the end of the chute 26.

In the operation of my device a blank Will be inserted in the die andthe clutch 34:

throwninto engagementby pressing down upon the treadle38 to causecontinued reciprocation of the roller 11 until the bit has been formed,after whiclrthe treadle will be released and the lever'25 actuated'tocause lateral displacement of the member 22 to eject the formed cutterbit 18 into the chute 26, It Willbe noted that during this ejectionoperation the gatefl27 will be closed as the I treadle 33 will be in anupward position-and the ejectedbitwillcome to rest against the gate 27.lVhile the bit remains in such a position the operator will beplacinganother blank in the dies '17andby the time the treadle 33 ispressed to causeoperation of theroller 11 the bit, within the chute'willhave had its heat redistributed-to the cutting portion. Thus, uponpressingthe treadle to cause operation of the roller 11, the bit in thechute will be allowed to drop into a receptacle containing a temperingbath. It

will thus be seen that I have provided an automatic means for temperingcutter bits formed by a sharpener which relieves the operator of agreatdealof trouble and, further, does away with-reheating the bltsbefore tempering such as is necessary when the bits are merelydropped onto the floor from the chute, as well as 'the ineffectiVe-temper-Iing-obtained Where the bit is atonce dropped into the tempering bath.

While I have .in this. application specifi cally described one formwhich my invention may assume in practice, it will be under; stood thatthisform ofthe same is shown for purposes of illustration and that theinvention may be modified and embodied in various other forms withoutdepartingfrom' its spirit or the scope of the appended claims. What Iclaim as new and desire to secure by-Letters Patent is: V

1. The combination comprising a bit sharpener, means for dischargingahot bit therefrom into a temperingbathadapted to receive said bit, andfmeans foipautomatir call-y interrupting. for a desired 'lengtlif, oftime the movement of. said-1 bath after said bit.isjdischargedlfrommaidmachine... j 2. The cameraman comprising a bit bittowardsl saidsharpener, means for discharging a hot bit therefrom into a temperingbath adapted to receive said bit, and means for controlling said bit toallow the heattherein to be substantially redistributed for propertempering before being subjected to said bath.

3. The combination comprising a bit sharpener, means for discharging ahot bit therefrom intoa tempering bath adapted to receive said'bit, andmeans for controlling said bit whereby the cutting portion'of said bitis subjected to a tempering heat before being subjected to said bath.

4s. The combination comprising a bit sharpener, means for discharging ahot bit therefrom into a tempering bath adapted to receive said bit, andmeans for controlling said bit to allow the heat in the body of said bitto be substantially distributed to the cutting'portion thereof'to' allowproper tempering before being subjected to'said bath.

5. A bit sharpening machine comprising anism and common to the controlof said interruptingmeans.

8. A bit sharpeninginachinecomprising bitformingmechanism, bit ejectormeans,

and means adapted to control said bit afterleaving said ejector inaccordance withoperatlons of other elements of said machine.

9. A.b1t.sharpen1ng machine comprising bit forming mechanism, bitejector means, and means adapted to automatically control said bit afterleaving said ejector in accordance with operations of other elements ofsaid machine. 7

10. Abit sharpening machine comprising bit forming mechanism, bitejector means, and means adapted to control said bit after leaving saidejector in accordance with manually controlled operations ofother'elements of said machine.

11. A bit sharpening machine comprising bitforming. mechanism, bitejector means, a support. for ejected bits, and means for controlling.the discharge of bits from said support after said bits have remainedthereon for an i ier val of time to allowredist'ribution of hea t fromthe shank thereof to heib t po tion-i 12;" bit" sharpening machinecomprising bit forming mechanism, bit ejecting means, a discharge chuteon to which an ejected a discharge chute onto which an ejected bit bitfalls, and a pivotally mounted member falls, and a member disposedtransversely of disposed in the path of movement of the hits 10 saidchute and movable to control the dis in said chute. 5 charge of a bittherefrom. In testimony whereof I aflix my signature.

18. A bit sharpening machine comprising bit forming mechanism, bitejecting means, CHARLES M. \VEIMER.

Certificate of Correction.

It is hereby certified that Letters Patent No. 1,604,865, grantedOctober 26, 1926, iipon the application of Charles M. NVeimer, ofBrownfield, Pennsylvania, for an improvement in Bit-Sharpening Machines,were erroneously issued to the inventor, said XVeimer, whereas saidLetters Patent should have been issued to Salli 0cm Machinery (lompcmy,a; Corporation of Massachusetts, said corporation being assignee of theentire interest in said invention,.as shown by the records ofassignments in this office; and that the said Letters Patent should beread with this correction therein that the same may conform to therecord of the case in the Patent Office.

Signed and sealed this 21st day of December, A. D. 1926.

[SEAL] M. J. MOORE,

Acting Commissioner of Patents.

